Unlock iPhone 3GS and iPhone 3G with 3.1.2 Firmware Using Ultrasn0w

Written By Sam on 14 October 2009

If you are having a iPhone 3G or iPhone 3GS with the latest iPhone OS 3.1.2, then you can use ultrasn0w to unlock it so that you can use it with any carrier. But before trying to unlock your iPhone, you should jailbreak it. To jailbreak your iPhone with 3.1.2 firmware, you can download Pwnage Tool 3.1.4. After downloading Pwnage Tool 3.1.4 you can read this “Tutorial to Jailbreak iPhone 3GS and 3G With 3.1.2 Firmware Using PwnageTool 3.1.4“. Once you are successful with jailbreaking your iPhone, you can follow the below steps to unlock it with ultrasn0w.

How to Unlock iPhone 3GS and iPhone 3G With 3.1.2 firmware Using Ultrasn0w

  • Download the latest version of iTunes and take a backup of all your data.
  • On your jailbroken iPhone 3G/3GS, start “Cydia” and select “Manage” and then “Sources”.
  • Select the “Edit” button at the top right of the screen.
  • Now press “Add” and enter the Cydia/APT URL as “http://repo666.ultrasn0w.com” and click on “Add Sources”.
  • unlock-iphone-3gs-and-iphone-3g-with-312-firmware-using-ultrasn0w
  • Once you are done with adding the sources, press “Return to Cydia” button and Cydia will now automatically update your sources.
  • Select http://repo666.ultrasn0w.com/ from the list of user entered sources and search for ultrasn0w.
  • Now press the “Install” button and then the “Confirm” button at the top right of the screen to install ultrasn0w.
  • Ultrasn0w will automatically unlock your iPhone 3G/3Gs so that you can use it with any carrier.
  • Restart our iPhone by holding down the power button for 3 seconds then moving the power slider that appears to the right. Press the power button again to turn on the phone.
  • Once you rebooted your iPhone you can use it with any SIM card of your choice.

So using ultrasn0w you can easily unlock your iPhone 3GS/3G with iPhone OS 3.1.2 after it has been successfully jailbroken using Pwnage Tool 3.1.4.

13 Responses to “Unlock iPhone 3GS and iPhone 3G with 3.1.2 Firmware Using Ultrasn0w”

  1. Mithin says:

    I just unlocked my iPhone 3GS but I don’t receive any signal and get the message ‘Unable to load network list’ when I try to select network. Is there any solution for this?

  2. iphone says:

    Same error…3GS 3.1.2 baseband 05.11.07. does this only work on the older modem Firmware???

  3. Shawn says:

    Frnds u will not be able to unlock ur iphone with baseband 05.11.07 coz ultrasn0w wont work with this baseband….u have to wait for next release of dev team…. unless if ur r lucky and u r having modem firware 05.80 or lower then u can downgrade ur baseband using fuzzyband safely…….else u have to wait for next release of dev team…..hope this helps u…..

  4. Deacon says:

    This method only works if you’re iPhone previously used a custom firmware that didn’t upgrade the baseband. Ultrasn0w will NOT work with BB 05.11.07.

    The only way to downgrade your baseband is if your iPhone has a bootloader of 5.9 or below. This version of the bootloader can only be found in the iPhone 3G models that were purchased on release date. The iPhone 3GS does NOT have this bootloader.

    To downgrade your baseband, follow the instructions in this blog, then download Fuzzyband from Cydia. It’s a simple app and it takes a few minutes to work.

  5. If the software you buy for the purpose of 3g iphone unlock gets old you do not need to worry as recent updates to these software services and the customer cares for answering of all your queries are also available for your benefit.

  6. meylis says:

    I have an iphone 3g version 3.1.2 (7D11) with modem firmware05.11.07 the problem is i can’t unlock it! hove am i can use my Iphone with T-Mobil

  7. shoaib says:

    i have a 2g iphone, if i jailbreak it to 3.2.1 how do i unlock it? is the same steps?

  8. wasim says:

    Hey friends,

    JB is done using blackrain, now i can access sprngboard, Blackrain icon is present, Network is not coming up, so I need to unlock it.. right? but I dont have wifi, how to do it? or how to install cydia without wifi.. when i open rain, it checks for internet.
    please help

  9. wasim says:

    I am also having same issues, wifi, gps and youtube doesnt work on jailbroken iphone 3g 3.1.2.
    Somehow gps started working but wifi was not able to detect any network even if you side beside router πŸ™‚ ) I know thats the limit, last option left was to tie up iphone with router πŸ™‚ )
    NOTE: its just a router without internet

    I restored iphone, ran blackrain.. now wifi is working but gps gone!!!..Yet there is no network on phone coz i didnt unlock it..and trying to search a way to install cydia to unlock!!!.. but everyone is using Wi-Fi to download cydia.. there is no offline method..
    Ok, there is.. followed those steps using iFunBox, but the directory structure is not the same as shown in video at http://www.youtube.com/watch?v=65_jOpfbZRs

    I even posted my comment over there..

    I dont know what to do.. totally pissed off.. its wastage of money buying this garbage..

  10. Clare says:

    I have a similar problem to Wasim’s. I jailbroke my iPhone using blackrain, and network and wifi work perfectly fine. GPS on the other hand is completely gone. Anyone knows what to do?

  11. Alvin Oh says:

    Hi people, i did the same thing with blackrain and i was not able to connect to my network carrier as the firmware is 05.11.07. So to get your phone network working back, just go into cydia and remove the the ultrasnow source package. That would get back your phone network hence we will have to wait for the new update package. Hopefully, if anyone know when that would be releasing, it would be great. Thanks people.

  12. sam says:

    i did the last update (3.1.2) but no service n unable to load network list.
    can any one help plz

  13. Odo says:

    Hi I have an iPhone 3G (3.1.2) with modem fw: 5.11.07 and have the same problem of No GSM network, and message popping up in Settings->Carrier saying β€˜Unable to load network list’…

    Uninstalling UltraSn0w will fix the problem somewhat that you get your old LOCKED network back so you can make phone calls.

    Apparently there is a way to unlock the iphone in a legit way!
    Your mobile operator will do it for you for a small fee (15 quids in the UK).
    I haven’t tried it, but its worth asking about it!

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